CN104226998B - A kind of method efficiently preparing metallic fiber filter felt - Google Patents
A kind of method efficiently preparing metallic fiber filter felt Download PDFInfo
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- CN104226998B CN104226998B CN201410412266.7A CN201410412266A CN104226998B CN 104226998 B CN104226998 B CN 104226998B CN 201410412266 A CN201410412266 A CN 201410412266A CN 104226998 B CN104226998 B CN 104226998B
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Abstract
The invention discloses a kind of method efficiently preparing metallic fiber filter felt, specifically implement according to following steps: step 1, paved fleece folded allotting filter felt blanket material；Step 2, carries out rolling process by the filter felt blanket material of preparation in step 1 through calender so that this sotck thinkness is reduced between 3～10mm；Step 3, the blank that will process in step 2, it is wrapped on the reel (1) of bracing frame by certain way；Step 4, together puts on the stone or metal plate for standing a stove on as a precaution against fire of vacuum sintering furnace by winding the blank handled well in step 3 together with bracing frame, marshalling, and leaves about ventilating duct between blank often rolling up；Step 5, sintering；Step 6, the filter felt semi-finished product that step 5 is obtained utilize calender carry out smooth process i.e. obtain metallic fiber filter felt.Solve that production efficiency present in prior art is low and the problem of the filter felt pliability difference of sintering.
Description
Technical field
The invention belongs to materials processing manufacturing technology field, be specifically related to one and efficiently prepare metallic fiber filter
The method of felt.
Background technology
Metallic fiber filter felt be paved through nonwoven by metallic fiber, join the technique such as felt and high temperature sintering and make
Standby a kind of high efficiency filter material.This material has that permeance property is good, pollutant holding capability is high, intensity is high, filters
The properties such as precision is easily-controllable, collapsible, renewable, life-span length, be widely used in filter, separate,
In the techniques such as noise reduction, gas distribution, catalysis, heat exchange.In recent years, along with metallic fiber filter felt is at high temperature cigarette
Gas dedusting and the popularization and application of two frontiers of purifying vehicle exhaust, metallic fiber is filtered felt by domestic and international market
Demand the most quickly increasing.For improving production capacity, most of producers select to buy the side of vacuum sintering furnace
Method, but this method will bring huge financial pressure to these producers.
Metallic fiber filter felt conventional sintering method is pressure sintering, and so-called pressure sintering is exactly will one by one
Filter felt blanket material stack in vacuum sintering furnace, carry out above pressurize counterweight, through a few hours high temperature sintering
After, obtain metallic fiber filter felt.This method, calculates according to of home make big specification vacuum sintering furnace,
Every heat sintering amount is up to 80～100m2, the time used by every heat is about 20h, inefficient,
The serious development hindering metallic fiber filter felt industry.
Summary of the invention
It is an object of the invention to provide a kind of method efficiently preparing metallic fiber filter felt, solve existing skill
The problem that present in art, low and sintering the filter felt pliability of production efficiency is poor.
Invention be employed technical scheme comprise that, a kind of method efficiently preparing metallic fiber filter felt, specifically presses
Implement according to following steps:
Step 1, paved fleece folded allotting filter felt blanket material；
Step 2, carries out rolling process by the filter felt blanket material of preparation in step 1 through calender so that this base
Material thickness is reduced between 3～10mm；
Step 3, the blank that will process in step 2, it is wrapped on the reel of bracing frame by certain way；
Step 4, together puts vacuum sintering furnace into by winding the blank handled well in step 3 together with bracing frame
Stone or metal plate for standing a stove on as a precaution against fire on, marshalling, and leave ventilating duct between blank often rolling up；
Step 5, sintering；
Step 6, filter felt semi-finished product step 5 obtained utilize calender to carry out smooth process i.e. to obtain gold
Belong to fiber filter felt.
The feature of the present invention also resides in,
Wherein, step 1 specifically according to following steps implement: use air-flow method or additive method paved go out width
Degree is the fleece of 500～800mm, filters felt formula according still further to different size, folded allot width be 500～
The filter felt blanket material of 800mm.
Wherein, step 3 is specifically implemented according to following steps: the blank that will process in step 2, is wound around
On the reel of bracing frame, in winding process, prevent blank from folding, during winding, will be every by sealing coat
Layer blank spaced apart, sealing coat be through special process process iron-chromium-aluminum metal net；It is completely wound
Blank diameter is not more than the diameter of dividing plate；Then wrap up two-layer protective layer at outermost layer, i.e. complete blank
Winding processes；But protective layer is material, and the filter felt to be produced with the filter identical precision of felt sintered is wanted
Height, and surface spraying has high-temperature resistant coating.
Wherein, bracing frame includes base and the reel being vertically fixed on base, and reel is cylindrical, its
Being provided with passage on sidewall, the bottom of reel is provided with dividing plate, and dividing plate is parallel with base；On dividing plate also
It is provided with passage.
Wherein, step 5 is specifically implemented according to following steps: put by the stone or metal plate for standing a stove on as a precaution against fire being placed with blank in step 4
Entering in vacuum sintering furnace, start to be sintered blank, sintering temperature is 1100～1200 DEG C, during insulation
Between be 3～5h；After sintering completes, blank furnace cooling, when temperature is down to 900～1000 DEG C,
Filling high purity inert gas in stove, noble gas is argon, and carries out forcing cooling；When furnace temperature is less than
When 60 DEG C, from stone or metal plate for standing a stove on as a precaution against fire, take off the blank sintered, peel off protective layer, and by the filter of sealing coat Yu sintering
Felt obtains after separating filtering felt semi-finished product.
The invention has the beneficial effects as follows,
1. this method can fully utilize the uniform temperature zone of sintering furnace, and the sintering amount of every stove is about tradition
2～3 times of method.
2., owing to being provided with air channel between material, add and on upper support frame cylinder and dividing plate, be all provided with heat radiation
Hole, heat can quickly come out from radiating area, and therefore this method rate of cooling is faster than traditional method
3～5 hours.
3. the method has the advantages that heating-cooling is fast, and filter felt stops in 700～900 DEG C of sensitizing temperature intervals
Time the shortest, intercrystalline almost without third phase separate out, the filter felt pliability that therefore prepared by the method is obvious
It is better than filter felt prepared by traditional method.
Accompanying drawing explanation
Fig. 1 is the structural representation of the bracing frame used in the inventive method；
Fig. 2 is the top view of the bracing frame used in the inventive method.
In figure, 1. reel, 2. blank, 3. protective layer, 4. base, 5. dividing plate.
Detailed description of the invention
The present invention is described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
The method of a kind of high-efficiency sintered metallic fiber filter felt, specifically implements according to following steps:
Step 1, use air-flow method or additive method paved go out 500～800mm width fibre web, this fibre
Web material matter is generally 316L, ferrum-chromium-aluminum, Hastelloy etc., further according to the filter felt formula of different size,
Fold the filter felt blanket material allotting a width of 500～800mm.
Step 2, carries out rolling process by the filter felt blanket material of preparation in step 1 through calender so that this base
Material thickness is between 3～10mm.
Step 3, the blank that will process in step 2, it is wrapped on the reel 1 of bracing frame.It is wrapped over
Cheng Zhong, prevents blank from folding, during winding, by spaced apart by every layer of blank of sealing coat, this sealing coat
For the iron-chromium-aluminum metal net processed through special process.Blank is wound around after terminating, and wraps up two-layer at outermost layer
Protective layer.Protective layer is also a kind of filter felt, and its material is identical with the filter felt sintered, but its precision is wanted
Being higher than sintered filter felt, additionally the surface of protective layer also coats one layer of special high-temperature resistant coating, really
Protect protective layer can play a protective role, also will not be with the filter felt generation metallurgical binding sintered.
The structure of bracing frame is, including base 4 and the reel 1 being vertically fixed on base, reel 1 is
Cylinder, its sidewall is provided with passage, and the bottom of reel 1 is provided with dividing plate 5, dividing plate 5 and the end
Seat is parallel；It is also equipped with passage on dividing plate 5.
Step 4, will put vacuum sintering furnace stone or metal plate for standing a stove on as a precaution against fire according to the blank handled well in step 3 into together with bracing frame
On, marshalling, and leave ventilating duct, ventilating duct width is 50～80mm.
Step 5, sintering, sinter putting in vacuum sintering furnace by the blank placed in step 4, sintering
Temperature is 1100～1200 DEG C, and temperature retention time is 3～5h.After having sintered, material furnace cooling, when
When temperature is down to 900～1000 DEG C, in stove, fill high-purity (purity is more than 99.999%) noble gas
(generally argon), and start blower fan carry out force cooling, when furnace temperature less than 60 DEG C time, from stone or metal plate for standing a stove on as a precaution against fire
Take off material, peel off protective layer and sealing coat just obtains filtering felt.
Step 6, filter felt step 5 obtained carries out smooth process through calender, obtains metallic fiber
Filter felt.
The restriction of the Breadth Maximum of fibre web frame to be supported height in step 1, and the height of bracing frame
Depending on the height of sintering furnace burner hearth uniform temperature zone.The length of fibre web is not particularly limited, and twines as long as whole
After end-of-job, blank and protective layer without departing from bracing frame dividing plate edge just.
Step 2 rolls and when processing intent is to make sintering, between fiber, has more overlapped points, and then can improve
The intensity of filter felt.
In step 3, bracing frame is the shelf of the load blank made by 310S material, in the middle of it is
Cylinder, is base below, is dividing plate at submounts about 100mm.Drum diameter is Φ 150mm,
Be by punching coiled sheet circle thick for 2mm after, be welded, be evenly distributed with the passage of Φ 5mm above,
Pitch-row between passage is about 5mm, and dividing plate is an annulus punched-plate being enclosed within reel, annulus
External diameter be Φ 250～300mm, the two is by being welded to connect, the aperture of passage and pitch-row above it
Consistent with on reel.
5 bracing frames of dividing plate are divided into two regions, and top is loading area, and bottom is radiating area.Base
Being one 5～10mm thick circular steel plate, a diameter of Φ 250～300mm, with reel by the company of welding
Connect.It addition, the weld seam of dividing plate and base and cylinder is all located at radiating area.
Step 4 leaves ventilating duct be in order to use after sintering high temperature air quenching be material cool time
Wind energy is passed through from the surrounding of material, thus accelerates rate of cooling.
In step 5, protective layer is to reduce the impact on filter felt of the burner hearth atmosphere, after increasing protective layer, filter
The color and luster of felt is substantially good than filter felt when being not added with protective layer.
The smooth process narrated in step 6 completes on step-by-step movement hydraulic press, its objective is to reduce
Thickness improves precision, and smooth rear thickness deviation can control, in ± 0.02mm, can meet client completely
Requirement.
Embodiment 1
The method of a kind of high-efficiency sintered metallic fiber filter felt, is embodied as step as follows:
Step 1, use air-flow method or additive method paved go out 500mm width fibre web, further according to not
The filter felt formula of same specification, the folded filter felt blanket material allotting a width of 500mm.
Step 2, carries out rolling process by the filter felt blanket material of preparation in step 1 through calender so that this base
Material thickness is 3mm.
Step 3, the blank that will process in step 2, it is wrapped on the reel 1 of supporter.It is wrapped over
Cheng Zhong, prevents blank from folding, during winding, by spaced apart by every layer of blank of sealing coat, this sealing coat
For the iron-chromium-aluminum metal net processed through special process.Blank is wound around after terminating, and wraps up two-layer at outermost layer
Protective layer.Protective layer is also a kind of filter felt, and its material is identical with the filter felt sintered, but its precision is wanted
Being higher than sintered filter felt, additionally the surface of protective layer also coats one layer of special high-temperature resistant coating, really
Protect protective layer can play a protective role, also will not be with the filter felt generation metallurgical binding sintered.
The structure of supporter is, including base 4 and the reel 1 being vertically fixed on base, reel 1 is
Cylinder, its sidewall is provided with passage, and the bottom of reel 1 is provided with dividing plate 5, dividing plate 5 and the end
Seat is parallel；It is also equipped with passage on dividing plate 5.
Step 4, will put vacuum sintering furnace stone or metal plate for standing a stove on as a precaution against fire according to the blank handled well in step 3 into together with supporter
On, marshalling, and leave ventilating duct, ventilating duct width is 50mm.
Step 5, sintering, sinter putting in vacuum sintering furnace by the blank placed in step 4, sintering
Temperature is 1100 DEG C, and temperature retention time is 3h.After having sintered, material furnace cooling, when temperature is down to
When 900 DEG C, in stove, fill high-purity (purity is more than 99.999%) noble gas (generally argon),
And start blower fan carry out force cooling.When furnace temperature is less than 60 DEG C, from stone or metal plate for standing a stove on as a precaution against fire, takes off material, peel off guarantor
Sheath and sealing coat just obtain filtering felt.
Step 6, filter felt step 5 obtained carries out smooth process through calender, obtains metallic fiber
Filter felt.
Embodiment 2
The method of a kind of high-efficiency sintered metallic fiber filter felt, is embodied as step as follows:
Step 1, use air-flow method or additive method paved go out 800mm width fibre web, further according to not
The filter felt formula of same specification, the folded filter felt blanket material allotting a width of 800mm.
Step 2, carries out rolling process by the filter felt blanket material of preparation in step 1 through calender so that this base
Material thickness is 10mm.
Step 3, the blank that will process in step 2, it is wrapped on the reel 1 of supporter.It is wrapped over
Cheng Zhong, prevents blank from folding, during winding, by spaced apart by every layer of blank of sealing coat, this sealing coat
For the iron-chromium-aluminum metal net processed through special process.Blank is wound around after terminating, and wraps up two-layer at outermost layer
Protective layer.Protective layer is also a kind of filter felt, and its material is identical with the filter felt sintered, but its precision is wanted
Being higher than sintered filter felt, additionally the surface of protective layer also coats one layer of special high-temperature resistant coating, really
Protect protective layer can play a protective role, also will not be with the filter felt generation metallurgical binding sintered.
The structure of supporter is, including base 4 and the reel 1 being vertically fixed on base, reel 1 is
Cylinder, its sidewall is provided with passage, and the bottom of reel 1 is provided with dividing plate 5, dividing plate 5 and the end
Seat is parallel；It is also equipped with passage on dividing plate 5.
Step 4, will put vacuum sintering furnace stone or metal plate for standing a stove on as a precaution against fire according to the blank handled well in step 3 into together with supporter
On, marshalling, and leave ventilating duct, ventilating duct width is 80mm.
Step 5, sintering, sinter putting in vacuum sintering furnace by the blank placed in step 4, sintering
Temperature is 1200 DEG C, and temperature retention time is 5h.After having sintered, material furnace cooling, when temperature is down to
When 1000 DEG C, in stove, fill high-purity (purity is more than 99.999%) noble gas (generally argon),
And start blower fan carry out force cooling.When furnace temperature is less than 60 DEG C, from stone or metal plate for standing a stove on as a precaution against fire, takes off material, peel off guarantor
Sheath and sealing coat just obtain filtering felt.
Step 6, filter felt step 5 obtained carries out smooth process through calender, obtains metallic fiber
Filter felt.
Embodiment 3
The method of a kind of high-efficiency sintered metallic fiber filter felt, is embodied as step as follows:
Step 1, use air-flow method or additive method paved go out 600mm width fibre web, further according to not
The filter felt formula of same specification, the folded filter felt blanket material allotting a width of 600mm.
Step 2, carries out rolling process by the filter felt blanket material of preparation in step 1 through calender so that this base
Material thickness is 6mm.
Step 3, the blank that will process in step 2, it is wrapped on the reel 1 of supporter.It is wrapped over
Cheng Zhong, prevents blank from folding, during winding, by spaced apart by every layer of blank of sealing coat, this sealing coat
For the iron-chromium-aluminum metal net processed through special process.Blank is wound around after terminating, and wraps up two-layer at outermost layer
Protective layer.Protective layer is also a kind of filter felt, and its material is identical with the filter felt sintered, but its precision is wanted
Being higher than sintered filter felt, additionally the surface of protective layer also coats one layer of special high-temperature resistant coating, really
Protect protective layer can play a protective role, also will not be with the filter felt generation metallurgical binding sintered.
The structure of supporter is, including base 4 and the reel 1 being vertically fixed on base, reel 1 is
Cylinder, its sidewall is provided with passage, and the bottom of reel 1 is provided with dividing plate 5, dividing plate 5 and the end
Seat is parallel；It is also equipped with passage on dividing plate 5.
Step 4, will put vacuum sintering furnace stone or metal plate for standing a stove on as a precaution against fire according to the blank handled well in step 3 into together with supporter
On, marshalling, and leave ventilating duct, ventilating duct width is 60mm.
Step 5, sintering, sinter putting in vacuum sintering furnace by the blank placed in step 4, sintering
Temperature is 1150 DEG C, and temperature retention time is 4h.After having sintered, material furnace cooling, when temperature is down to
When 950 DEG C, in stove, fill high-purity (purity is more than 99.999%) noble gas (generally argon),
And start blower fan carry out force cooling.When furnace temperature is less than 60 DEG C, from stone or metal plate for standing a stove on as a precaution against fire, takes off material, peel off guarantor
Sheath and sealing coat just obtain filtering felt.
Step 6, filter felt step 5 obtained carries out smooth process through calender, obtains metallic fiber
Filter felt.
The method utilizing the present invention carries out the production of NTF15D model fiber felt and prepares, with traditional method system
Standby fiber felt is compared, and both performance comparison are as shown in table 1,
The performance comparison of fiber felt prepared by table 1 traditional method and the inventive method
| Tensile strength | Setback performance | |
| Traditional method | 24～26MPa | Well |
| The inventive method | 23～26MPa | Well |
When the method utilizing the present invention produces NTF15D model fiber felt, its yield aspect and traditional method
Comparing, tool is significantly improved, specifically:
Use Traditional Method, be sintered, often with the vacuum drying oven that size of burner hearth is 1850 × 1300 × 850mm
The sintering amount of stove is about 60m2, the time used by whole sintering process is about 20h.
Use the inventive method, be sintered with the vacuum drying oven that size of burner hearth is 1850 × 1300 × 850mm,
The sintering amount of every stove is about 120～150m2, the time used by whole sintering process is about 15h.
From above-mentioned contrast, the sintering amount of method one stove of the present invention is compared than traditional method and is improved 2
More than Bei.
Claims (3)
1. the method efficiently preparing metallic fiber filter felt, it is characterised in that specifically according to following steps
Implement:
Step 1, paved fleece folded filter felt blanket material of allotting, specifically according to following steps enforcement:
Use air-flow method paved go out width be 500～800mm fleece, according still further to different size filter felt
Formula, folds and allots the filter felt blanket material that width is 500～800mm；
Step 2, carries out rolling process by the filter felt blanket material of preparation in step 1 through calender so that this base
Material thickness is reduced between 3～10mm；
Step 3, the blank that will process in step 2, the reel (1) of bracing frame it is wrapped in by certain way
On, specifically implement according to following steps:
The blank that will process in step 2, is wrapped on the reel (1) of bracing frame, in winding process,
Preventing blank from folding, during winding, by spaced apart by every layer of blank of sealing coat, described sealing coat is ferrum
Chromium aluminum metal net, the blank diameter being completely wound is not more than the diameter of dividing plate (5), then at outermost layer
Parcel two-layer protective layer (3), i.e. complete blank winding process, the material of described protective layer (3) with
The filter felt sintered is identical, but height wanted by its precision filter felt to be produced, and surface spraying has high temperature resistant
Coating；
Step 4, together puts vacuum sintering furnace into by winding the blank handled well in step 3 together with bracing frame
Stone or metal plate for standing a stove on as a precaution against fire on, marshalling, and leave ventilating duct between blank often rolling up；
Step 5, sintering；
Step 6, filter felt semi-finished product step 5 obtained utilize calender to carry out smooth process i.e. to obtain gold
Belong to fiber filter felt.
The method efficiently preparing metallic fiber filter felt the most according to claim 1, it is characterised in that
Support frame as described above, including base (4) and the reel (1) that is vertically fixed on base, described reel (1)
For cylinder, its sidewall being provided with passage, the bottom of described reel (1) is provided with dividing plate (5),
Described dividing plate (5) is parallel with base；Described dividing plate is also equipped with passage on (5).
The method efficiently preparing metallic fiber filter felt the most according to claim 2, it is characterised in that
Described step 5 is specifically implemented according to following steps:
The stone or metal plate for standing a stove on as a precaution against fire being placed with blank in step 4 is put in vacuum sintering furnace, starts blank is sintered,
Sintering temperature is 1100～1200 DEG C, and temperature retention time is 3～5h；
After sintering completes, blank furnace cooling, when temperature is down to 900～1000 DEG C, fill out in stove
Filling high purity inert gas, described noble gas is argon, and carries out forcing cooling；
When furnace temperature is less than 60 DEG C, from stone or metal plate for standing a stove on as a precaution against fire, takes off the blank sintered, peel off protective layer (3), and
Obtain after being separated with the filter felt of sintering by sealing coat filtering felt semi-finished product.
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| CN201410412266.7A CN104226998B (en) | 2014-08-20 | 2014-08-20 | A kind of method efficiently preparing metallic fiber filter felt |
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|---|---|---|---|
| CN201410412266.7A CN104226998B (en) | 2014-08-20 | 2014-08-20 | A kind of method efficiently preparing metallic fiber filter felt |
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| CN104226998B true CN104226998B (en) | 2016-09-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109848408B (en) * | 2019-01-29 | 2020-12-11 | 西安菲尔特金属过滤材料股份有限公司 | Ultrahigh-precision fiber felt and preparation method thereof |
| CN110090494A (en) * | 2019-05-08 | 2019-08-06 | 浙江省浦江宏达有限公司 | A kind of preparation method of high intensity high-precision filtration material |
| CN115430205A (en) * | 2022-09-27 | 2022-12-06 | 山西奇色环保科技股份有限公司 | Method for preparing large-size sintered felt by rolling method |
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